The late Sen. Ted Kennedy is shown here running for U.S. Senate in 1962.
(AP)

The late Sen. Ted Kennedy arranged to "rent" a brothel for a night while on a visit to Chile and other Latin American countries decades ago, according to a 1961 State Department memo obtained and published by the watchdog group Judicial Watch.

Judicial Watch released several documents said to be from Kennedy's FBI file. The group said it obtained a cleaner copy of the State Department memo after a mostly redacted version was made public earlier.

The Dec. 28, 1961, memo described a tour of several Latin American countries Kennedy made while he was an assistant prosecutor with Suffolk County, Mass.

Traveling with a professor, Kennedy "insisted on interviewing 'the angry young men' of the country," according to the memo. This included "communists and others who had left-wing views."

The memo said that during Kennedy's stop in Santiago, "he made arrangements to 'rent' a brothel for an entire night." The memo said Kennedy allegedly "invited one of the Embassy chauffeurs to participate in the night's activities."

The memo suggested other officials had run-ins with Kennedy on the trip. It said that in Mexico, Ambassador Mann -- presumably longtime State Department diplomat Thomas Mann -- pushed back when Kennedy wanted to invite "certain left-wingers" to the embassy residence for interviews.

"Mann took the strong position that he would not invite such people and stated that if any such interviews were to be conducted, all arrangements should be made by Kennedy himself," the memo said.

A State Department official in Lima said Kennedy "made similar requests" in Peru.

Kennedy, who went on to represent Massachusetts as one of the longest-serving U.S. senators in history, died in August 2009 after a battle with brain cancer.

The documents obtained by Judicial Watch also include a July 1969 FBI memo detailing a threatening letter Kennedy apparently received earlier that month. The two authors of the letter claimed they'd accepted $20,000 a piece "to bump your nasty ... off." An obscenity, one of many in the note, was redacted. The letter went on to repeatedly threaten Kennedy's life. According to the memo, the individuals who wrote the note were stationed at the San Diego Marine Corps Recruit Depot and had already been "confined to the brig on other charges." The case was referred to "military authorities."

Also included in the file was a 1963 memo, first published by Judicial Watch in September, that described an effort by Kennedy and brother Robert, the attorney general, to secure a visa for Katalin Karady, a "former Hungarian actress of unsavory reputation." The memo detailed a host of allegations against Karady, including suspicion she was a "communist collaborator," a prostitute and the fiancee of a Hungarian Nazi operative during World War II. The former actress was living in Brazil at the time and denied communist and Nazi connections. After intervention from the Kennedy brothers, she received a visa.